This is a mechanical bet (same bet/procedure over and over) that i had some luck with, it's not the HG, but i guess it can make some nice profits, and it's easy to play;
Begin placing 1 QUAD at 1/5, next bet a second Quad at 4/8, next place a Quad at 7/11,...and so on +1 Quad bet for every spin, until 9 Quads are bet, (That would mean you've bet the last 9th quad at 25/29.)
Progression; After the 7th quad bet, you begin progression (double bet for each loss) but continue placing quads until 9 quads are bet, after the 8th quad bets, double, after the 9th quad bet double, THEN double for each loss until hit. (This progression may seem to be crazy, but usually, in normal cases progression don't go that far!) Stop/Restart at any hit--With the exception if a single quad hit, then you calculate that as a loss, (and continue bet) IF 4 or more quads bet, IF you get a hit when 6 quads are bet, you also calculate that as a loss. (and continue bet).
BR needed 300u (recommended play with 1u bets and a +100u wingoal).
example of gameplay you can see here; link:s://roulette-simulator.info/game/cbb5eb3b21f082deb03e57d9e2b803d7 (link:s://roulette-simulator.info/game/cbb5eb3b21f082deb03e57d9e2b803d7)
(Chart played with 10u bets)